03 Discovery II Check Engine Lights on. Went to check with OBDII scanner and it powers on, but I get link failure, Key position II. Checked pin 16 +12v. Check pins 4,5 resistance battery disconnected, shows good almost 0. Checked Pin 7 K Line 0v "problem". Checked continuity pin 7 to pin 32 ECU tests OK.
Disconnected ABS, Cruise, Stabilizer, Trans modules to K Line.
I assume ECU is supposed to supply voltage to K Line. Is there a way to check ECU pin for voltage?
In ideas on what to else check? What could be pulling K Line down.

 

I have problems linking my code reader. I open the under-steering wheel fuse box door, remove the styrofoam thingy, and push on the back of the plug. I have small enough hands to be able to squeeze in there. It will link then. I might have to turn the ignition and link button a couple of times. Try that.

 

So are you saying behind the fusebox Styrofoam is where the other end of the OBD11 connects. One end in the footwell and the other end behind Styrofoam?

 

When you open the panel beneath the steering wheel, on the left is the fuse box, on the lower right is the OBDII connector. There is a styrofoam piece in the middle below the steering wheel. That has to come out. I believe it is glued in, but mine just pops out. Then I squeeze my left hand in behind the OBDII connector until I can feel the back of it. I then wiggle the code reader connector with my right hand in the front. After that little bit of fun, I turn on the ignition and link the code reader. It sometimes take me a couple of tries to get it to link. You have to have thin fingers. Good luck.

 

I have the OBDII connector already by the footwell where I can connect it with my code reader with both hands and wiggle it. This is how I perform the voltage tests on the pins.
Are you saying the other end that connects to the modules lives behind the foam? Or does it run directly over to the wiring header on the passenger side by the modules.


Whats odd is I have continuity from pin 7 to pin 32 on ECU ,but show no volts on that wire, with key in position 2.


Thinking it is related to something like this as I followed this test procedure.
www.youtube.com/watch?v=0e-9_FuMWzI

 

Here are pictures of what I'm trying to describe. In the last picture you can see that I'm squeezing my fingers in behind the OBDII connector and holding pressure on the back of the connector. Do that while connecting your code reader and then turn ignition to on and click on the code reader to connect. I hope that helps.

 

I appreciate the pictures, but my connector is already disconnected from the fascia for easy access.
If you watch the video, the scenario is what I am experiencing with 0 volts on pin 7 which connects pin wire K Line to all modules per the rave manual
I am trying to figure out why I have 0 volts on K line pin 7.
I assume I should be seeing the same voltage as in the video on Pin 7 when it is corrected.
If someone could tell me the proper voltage I should be seeing on Pin 7 OBDII Connection in both Key Off and Key Position II. The volt meter shows 0 volts

 

I had a similar issue. https://landroverforums.com/forum/di...il-data-58201/

and it was related to this: https://landroverforums.com/forum/di...-repair-57435/

 

I was wondering about that header C0286. On the outside of the protective covering it looks clean.
How did yours look on the outside vs. once you cut the covering? How did you determine it was the header?
Also, I assume they are connectors or is it something different.

 

I opened up the header last night and C0286 visually looks clean. What test should I perform on this header to determine where the fault could be?
I could test for continuity from OBDII port pin 7 to pin C2086 pin 16. From C0286 pin 16 in header meshes with pins 13,14,15,17,18,19,20 on header C0286, which connect to all modules. But what else could I test. Is there a way to test if the ECU is faulty?